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Finding the Fourth Proportional to 12,995,786.60, 19,493,679.90 and 3,412,133.90

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Solution

The fourth proportional to 12,995,786.60, 19,493,679.90 and 3,412,133.90 is: 5,118,200.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,995,786.60 : 19,493,679.90 = 3,412,133.90 : x
  2. Step 2: Convert to fraction form
    12,995,786.60/19,493,679.90 = 3,412,133.90/x
  3. Step 3: Cross multiply
    12,995,786.60x = 19,493,679.90 × 3,412,133.90
  4. Step 4: Simplify right side
    12,995,786.60x = 66,515,046,022,538.60
  5. Step 5: Solve for x
    x = 66,515,046,022,538.60/12,995,786.60
  6. Step 6: Final answer
    x = 5,118,200.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.